S. Kluth
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View article: The strong coupling constant: state of the art and the decade ahead
The strong coupling constant: state of the art and the decade ahead Open
Theoretical predictions for particle production cross sections and decays at colliders rely heavily on perturbative Quantum Chromodynamics (QCD) calculations, expressed as an expansion in powers of the strong coupling constant α S . The cu…
QCD and top phenomena at future colliders Open
In this review we summarise expectations for measurements of QCD observables and top quark properties from studies performed for proposed future collider projects.
View article: Measurement of the 1-jettiness event shape observable in deep-inelastic electron-proton scattering at HERA
Measurement of the 1-jettiness event shape observable in deep-inelastic electron-proton scattering at HERA Open
The H1 Collaboration reports the first measurement of the 1-jettiness event shape observable $τ_1^b$ in neutral-current deep-inelastic electron-proton scattering (DIS). The observable $τ_1^b$ is equivalent to a thrust observable defined in…
View article: Is Julia ready to be adopted by HEP?
Is Julia ready to be adopted by HEP? Open
The Julia programming language was created 10 years ago and is now a mature and stable language with a large ecosystem including more than 8,000 third-party packages. It was designed for scientific programming to be a high-level and dynami…
The dead cone effect in heavy quark jets observed in momentum space and its QCD explanation Open
The production of a heavy quark is accompanied by gluon bremsstrahlung with angular and momentum spectra predicted by perturbative Quantum Chromo Dynamics (QCD). The radiation off heavy quarks is predicted to be suppressed for large moment…
View article: 50 Years of quantum chromodynamics
50 Years of quantum chromodynamics Open
Quantum Chromodynamics, the theory of quarks and gluons, whose interactions can be described by a local SU(3) gauge symmetry with charges called “color quantum numbers”, is reviewed; the goal of this review is to provide advanced Ph.D. stu…
A Bayesian tune of the Herwig Monte Carlo event generator Open
The optimisation (tuning) of the free parameters of Monte Carlo event generators by comparing their predictions with data is important since the simulations are used to calculate experimental efficiency and acceptance corrections, or provi…
Dead cone effect in charm and bottom quark jets Open
The evolution of a heavy quark initiated jet is mainly ruled by gluon bremsstrahlung. As a consequence of the dead-cone effect, this radiation is suppressed in the forward direction at angles smaller than that proportional to the heavy qua…
Observation of the dead cone effect in charm and bottom quark jets and its QCD explanation Open
International audience
Observation of the dead cone effect in charm and bottom quark jets and its QCD explanation Open
The production of a heavy quark is accompanied by gluon bremsstrahlung which is suppressed at small angles $Θ\lesssim M_Q/E$ for mass $M_Q$ and high energy $E$ according to perturbative Quantum Chromo Dynamics (QCD) (``dead cone effect'').…
A Bayesian tune of the Herwig Monte Carlo event generator Open
The optimisation (tuning) of the free parameters of Monte Carlo event generators by comparing their predictions with data is important since the simulations are used to calculate experimental efficiency and acceptance corrections, or provi…
View article: The strong coupling constant: State of the art and the decade ahead
The strong coupling constant: State of the art and the decade ahead Open
This document provides a comprehensive summary of the state-of-the-art, challenges, and prospects in the experimental and theoretical study of the strong coupling $\alpha_s$. The current status of the seven methods presently used to determ…
High precision determination of as from a global fit of jet rates Open
We present state-of-the-art extractions of the strong coupling based on N3LO+NNLL accurate predictions for the two-jet rate in the Durham clustering algorithm at e+e- collisions, as well as a simultaneous fit of the two- and three-jet rate…
$a_S$ from energy-energy correlations and jet rates in $e^+e^-$ collisions Open
We present a comparison of the computation of energy-energy correlations and Durham algorithm jet rates in $e+e−$ collisions at next-to-next-to-leading logarithmic accuracy matched with the $O$ $(α3s)$ perturbative prediction to LEP, PEP, …
View article: $\alpha_s$(2019) discussions summary
$\alpha_s$(2019) discussions summary Open
A summary of the main points of discussion raised during the talks and their follow-up questions,as well as in the round table of the last day of the $α_s$ (2019) workshop, is presented. The discussions not only focused on particular issue…
Old and new observables for $α_S$ from $e^+e^-$ to hadrons Open
We present a computation of energy-energy correlation in $e+e−$ annihilation at next-to-next-to-leading order accuracy in perturbative QCD matched with the next-to-next-to-leading logarithmic resummed calculation for the back-to-back limit…
View article: $α_s$(2019): Precision measurements of the QCD coupling
$α_s$(2019): Precision measurements of the QCD coupling Open
This document collects a written summary of all contributions presented at the workshop "$α_s$(2019): Precision measurements of the strong coupling" held at ECT* (Trento) in Feb. 11--15, 2019. The workshop explored in depth the latest deve…
View article: $\alpha_s$(2019): Precision measurements of the QCD coupling
$\alpha_s$(2019): Precision measurements of the QCD coupling Open
This document collects a written summary of all contributions presented at the workshop '$\\alpha_s$(2019): Precision measurements of the strong coupling' held at ECT* (Trento) in Feb. 11--15, 2019. The workshop explored in depth the lates…
Theory report on the 11th FCC-ee workshop Open
The FCC at CERN, a proposed 100-km circular facility with several colliders in succession, culminates with a 100 TeV proton-proton collider. It offers a vast new domain of exploration in particle physics, with orders of magnitude advances …
Precise determination of α<sub>S</sub>($ m_{Z^0 } $) from a global fit of energy-energy correlations to NNLO+NNLL predictions Open
We present a determination of the strong coupling constant α S ( $ m_{Z^0 } $ ) using a global fit of theory predictions in next-to-next-next-leading-order (NNLO) combined with resummed predictions at the next-to-next-leading-log level (NN…
Precise determination of the strong coupling from energy-energy correlation Open
In this contribution we present a determination of the strong coupling from a fit of QCD predictions for energy-energy correlation measured in electron-positron collisions at various center-of-mass energies. Experimental data are compared …
Top quark pair property measurements using the ATLAS detector at the LHC Open
Precise measurements of the properties of the top quark test the Standard Model (SM) and can be used to constrain new physics models. As it may be significantly enhanced by the presence of new physics, the ttbar production charge asymmetry…
View article: C++ software quality in the ATLAS experiment: tools and experience
C++ software quality in the ATLAS experiment: tools and experience Open
In this paper we explain how the C++ code quality is managed in ATLAS using a range of tools from compile-time through to run time testing and reflect on the substantial progress made in the last two years largely through the use of static…
View article: Parton Radiation and Fragmentation from LHC to FCC-ee
Parton Radiation and Fragmentation from LHC to FCC-ee Open
This document collects the proceedings of the "Parton Radiation and Fragmentation from LHC to FCC-ee" workshop (http://indico.cern.ch/e/ee\_jets16) held at CERN in Nov. 2016. The writeup reviews the latest theoretical and experimental deve…
Measurements of jet rates with the anti-k<sub>t</sub>and SISCone algorithms at LEP with the OPAL detector Open
We study jet production in e+e− annihilation to hadrons with data recorded by the OPAL experiment at LEP at centre-of-mass energies between 90 GeV and 207 GeV. The jet production rates were measured for the first time with the anti-kt and …